Marine small-scale reactor external axial power range measuring apparatus

Abstract

The invention discloses marine small-scale reactor external axial power range measuring apparatus, and relates to the technical field of marine nuclear power. The apparatus comprises at least three power range channels, a signal amplifying unit, a power measuring unit and a signal output unit; each power range channel has at least four ionization chambers, and the ionization chambers are distributed circumferentially at the exterior of a reactor; the signal amplifying unit is used to convert a received current signal into a voltage signal and amplify the voltage signal for output; the power measuring unit comprises a microprocessor, a high-voltage power supply and a low-voltage power supply; and the signal output unit is used to convert an analog signal output by the microprocessor into adigital signal and transmit the digital signal to a display device. The marine small-scale reactor external axial power range measuring apparatus provided by the invention compensates for the defectsthat a current reactor external nuclear measuring device and scheme cannot perform measurement of power measuring range neutron fluence rate axial distribution, and can calculate various data relatedto reactor safety such as axial power deviations, power offsetting and quadrant slant angles, thereby providing more feasibility and specific parameters for reactor control.

Description

technical field [0001] The invention relates to the technical field of ship nuclear power, in particular to a device for measuring the external axial power range of a small ship reactor. Background technique [0002] During the use and maintenance of the offshore platform reactor, it is necessary to measure the parameters of the core operation in real time to monitor the operating status of the reactor and deal with related problems in a timely manner. [0003] At present, the external nuclear measurement channel of the offshore platform reactor adopts a three-stage measurement scheme, that is, the source range measurement, the intermediate range measurement, and the power range measurement. The measurement ranges of the two ranges overlap each other, so that there is no blind area in the seamless connection between the measuring instruments and the monitoring process. [0004] As the main device with the function of measuring the neutron fluence rate of the reactor, the po...

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Problems solved by technology

[0005] 1. Due to the technical limitations of small marine reactors, it is difficult to configure the core measurement system, and it is impossible to measure the operating parameters of the core, so the current nuclear measurement scheme for small marine reactors is lacking in function;

[0006] 2. The height of the general nuclear power plant reactor is about 3.6m, and the small marine reactor is only 1.4m. The traditional multi-stage ionization chamber measurement output structure is distributed on the upper and lower parts of the core, occupying a large space, and its original structure is difficult to apply to the small marine reactor. middle

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